European otter vs Pacific white-sided dolphin

Lutra lutra compared with Lagenorhynchus obliquidens

Key Differences

• European otter is Vulnerable while Pacific white-sided dolphin is Least Concern.

Taxonomic Classification

Rank	European otter	Pacific white-sided dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Carnivora (Carnivorans)	Cetacea (Whales & Dolphins)
Family	Mustelidae (Weasels & Otters)	Delphinidae (Oceanic Dolphins)
Genus	Lutra (Otters)	Lagenorhynchus
Species	Lutra lutra	Lagenorhynchus obliquidens

Evolutionary Relationship

European otter and Pacific white-sided dolphin share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

European otter

VU — Vulnerable

Trend: Stable →

Pacific white-sided dolphin

LC — Least Concern

Physical Characteristics

Attribute	European otter	Pacific white-sided dolphin
Diet	Carnivore	—
Average Lifespan	10 years	—
Average Length	1.0 m	—
Average Weight	10.0 kg	—

Habitat & Geographic Range

European otter

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Pacific white-sided dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

European otter

Sleek semi-aquatic mustelid found along clean rivers, streams, and coastlines across Europe and Asia. European otters can reach 1.3 meters in length and are highly skilled fish hunters, using sensitive whiskers to detect prey movements. Requiring unpolluted water with abundant fish, they are an indicator species for freshwater ecosystem health. Once nearly extinct in Western Europe from hunting and pollution, populations have recovered significantly following water quality improvements.